Curling iron



FIG. 1 is a perspective view of a curling iron showing my new design with the clamp in its closed position;

FIG. 2 is a perspective view thereof with the clamp shown in its raised position;

FIG. 3 is a front end elevational view thereof;

FIG. 4 is a rear end elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a side elevational view thereof, the two side elevational views being mirror images of one another; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a curling iron, as shown and described. 